165703873 has 4 divisors (see below), whose sum is σ = 165944368. Its totient is φ = 165463380.

The previous prime is 165703861. The next prime is 165703903. The reversal of 165703873 is 378307561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165703873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165703073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119211 + ... + 120592.

It is an arithmetic number, because the mean of its divisors is an integer number (41486092).

Almost surely, 2^165703873 is an apocalyptic number.

It is an amenable number.

165703873 is a deficient number, since it is larger than the sum of its proper divisors (240495).

165703873 is an equidigital number, since it uses as much as digits as its factorization.

165703873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240494.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 165703873 is about 12872.6016406941. The cubic root of 165703873 is about 549.2594694988.

The spelling of 165703873 in words is "one hundred sixty-five million, seven hundred three thousand, eight hundred seventy-three".